Coaxial cable with plug

ABSTRACT

A coaxial cable with a Plug comprises a coaxial cable ( 1 ) in which an outer conductor ( 103 ) is provided around a center conductor ( 101 ) with an insulator ( 102 ) interposed therebetween and a plug ( 2 ) having a center contact ( 201 ) electrically connected to the center conductor ( 101 ) via a center conductor connecting member ( 203 ) and an outer contact ( 202 ) electrically connected to the outer conductor ( 103 ) via an outer conductor connecting member ( 204 ). The center contact ( 201 ) and the outer contact ( 202 ) rotate about an axis (RX) perpendicular to the axis ( 201 X) of the center contact while maintaining the electrical connection between the center contact ( 201 ) and the center conductor ( 101 ) and the electrical connection between the outer contact ( 202 ) and the outer conductor ( 103 ).

TECHNICAL FIELD

The present invention relates to a coaxial cable with a plug, and inparticular, it relates to a technology, which is effective when appliedto a coaxial cable with a plug connected to a television antenna and areceiver.

BACKGROUND ART

Heretofore, in general, for a data transfer cable, there has been knowna coaxial cable provided with an external conductor, for example, suchas a netted copper wire allowing an insulator to intervene around acopper core wire (herein after referred to as a central conductor). Atthis time, the external conductor is cylindrically provided around thecentral conductor, and has an advantage of shutting off a noise. Hence,the coaxial cable is widely used as a cable of transferring a highfrequency signal such as a television signal.

Further, when the coaxial cable is connected to the television antennaand receiver, the coaxial cable with a plug is used, which is providedwith a plug having a central contact electrically connected to thecentral conductor of the coaxial cable and an external contactelectrically connected to the external conductor. At this time, in thecoaxial cable with a plug, as shown in FIG. 21( a), there are a straighttype in which the axial direction 201X of the central contact 201 andthe pulling direction 1X of the coaxial cable 1 are in parallel, and asshown in FIG. 21( b), a right angle type in which the axial direction201X of the central contact 201 and the pulling direction 1X of thecoaxial cable 1 make a right angle.

In the case of the coaxial cable with a plug of the straight type, forexample, when it is connected to a receiving terminal of the televisionlocated at a wall surface at home and the like, a bulging out from thewall surface of the coaxial cable 1 becomes large. Hence, the bulgedportion catches legs and the like, thereby causing a high risk offalling down or the cable being pulled out. Further, in case thereceiving terminal of the television is, for example, located at thebackside of furniture, a space in consideration of the bulged portion ofthe coaxial cable 1 has to be secured since the coaxial cable is severedwhen applied with an unnatural force and bent.

In the meantime, in the case of the coaxial cable with a plug of theright angle type, since the axial direction 201X of the central contact201 and the pulling direction 1X of the coaxial cable 1 makes a rightangle, when connected to the wall surface, the bulge of the coaxialcable 1 is small, so that a narrow space behind furniture and the likedoes not cause hindrance.

However, in such a coaxial cable with a plug, since the positionalrelation between the axial direction 201X of the central contact 201 andthe pulling direction 1X of the coaxial cable 1 is fixed, either of thestraight type or the right angle type has to be selected according to anapplication and a usage place. Hence, for example, due to ahousing-moving and a change of design, the situation where, for example,the straight type coaxial cable with a plug becomes difficult to useoccurs, the coaxial cable with a plug of the right angle type has to benewly purchased. That is, in the conventional coaxial cable with a plug,there has been a problem that a degree of freedom of adaptability to theapplication and the usage place is low.

Consequently, an object of the present invention is to provide a coaxialcable with a plug, which has no such a defect of the coaxial cable witha plug and is high in a degree of freedom of adaptability to theapplication and the usage place.

DISCLOSURE OF THE INVENTION

The present invention provides a coaxial cable with a plug, comprisingan external conductor allowing an insulator to intervene around acentral conductor, and a plug comprising the central contactelectrically connected to the central conductor and the external contactelectrically connected to the external conductor wherein the centralcontact and the external contact rotate with an axis in a directionorthogonal to the axial direction of the central conductor as arotational axis while maintaining respective electrical connections withthe central contact and the central conductor and the external contactand the external conductor. By the rotation of the contact portion anddepending on an application and a usage place, for example, the coaxialcable can be used either in state where the axial direction of thecentral contact and the pulling direction of the cable are in parallelor in state where the axial direction of the central contact and thepulling direction of the cable make a right angle. Further, by rotatingwhile maintaining the electrical connections, regardless of the statewhere the axial direction of the central contact and the pullingdirection of the cable are in parallel or the state where the axialdirection of the central contact and the pulling direction of the cablemake a right angle, when the contact portion is in a rotatable range,the coaxial cable can be used with a flexible angle. Hence, comparing tothe conventional coaxial cable with a plug, a degree of freedom ofadaptability to the application and the usage place can be enhanced.

Further, the present invention in a coaxial cable with a plug,comprising an external conductor allowing an insulator to intervenearound a central conductor, and a plug comprising the central contactelectrically connected to the central conductor and the external contactelectrically connected to the external conductor wherein the plugcomprises the contact portion, and a main body unit comprising a centralconductor connecting member electrically connecting the central contactand the central conductor, an external conductor connecting memberconnecting the external conduct and the external conductor, and aninsulating member electrically insulating the central conductorconnecting member and the external conductor connecting member, and thecontact portion rotates with a axis in a direction orthogonal to theaxial direction of the central conduct as a rotational axis whilemaintaining electrical connections with the central contact and thecentral conductor connecting member and electrical connections with theexternal contact and the external conductor connecting member,respectively. In this way, according to the application and the usageplace, the coaxial cable can be used with a flexible angle, for example,in such a state in which the axial direction of the central contact andthe pulling direction of the cable are in parallel or a state in whichthe axial direction of the central contact and the pulling direction ofthe cable make a right angle or the like. Hence, comparing to theconventional coaxial cable with a plug, a degree of freedom ofadaptability to the application and the usage place can be enhanced.

Further, the present invention comprises a pair of protrusions to becomea point of support for rotation at one end of the cylindrical conductorportion of the external contact of the coaxial cable with a plug, andmoreover, an opening is made from the one protrusion so as tocommunicate with an inner space of the cylindrical conductor portion,and the central contact has a connecting portion with the centralconductor connecting member on the rotational axis, and is bent in adirection to the protrusion provided with the opening portion from thecentral axis of the external contact. In this way, the coaxial cable canbe rotated while maintaining the electrical connections with the centralcontact and the central conductor connecting member and electricalconnections with the external conduct and the external conductorconnecting member.

Further, the present invention has the external conductor connectingmember of the coaxial cable with a plug comprises a plurality ofconductor parts, and has the protrusion of the external contact nippedand support-fixed by the plurality of conductor parts. Further, at thistime, the insulating member of the main body unit of the plug isprovided in such a way that the central conductor connecting member andthe external conductor connection member maintain a coaxial structure,so that the change of the impedance of the signal to be transferred canbe avoided.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic illustration showing a general structure of acoaxial cable with a plug of a first embodiment according to the presentinvention;

FIG. 2 is a schematic illustration showing an internal structure of thecoaxial cable with a plug of the first embodiment, and is a view seenfrom the same direction as FIG. 1;

FIG. 3 is a schematic illustration showing an internal structure of thecoaxial cable with a plug of the first embodiment, and is a view seenfrom the right direction of the sheet surface of FIG. 1;

FIG. 4 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 5 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 6 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 7 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 8 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 9 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 10 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 11 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the first embodiment;

FIG. 12 is a schematic illustration to explain a using method of thecoaxial cable with a plug of the first embodiment;

FIG. 13 a schematic illustration to explain an assembly method of thecoaxial cable with a plug of a second embodiment according to thepresent invention;

FIG. 14 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the second embodiment;

FIG. 15 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the second embodiment;

FIG. 16 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the second embodiment;

FIG. 17 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of a third embodiment according to the presentinvention;

FIG. 18 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the third embodiment;

FIG. 19 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the third embodiment;

FIG. 20 is a schematic illustration to explain an assembly method of thecoaxial cable with a plug of the third embodiment; and

FIG. 21 is a schematic illustration to show a general structure of aconventional coaxial cable with a plug.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be described more in detail below withreference to the accompanying drawings.

In all the drawings to explain the embodiments, those parts having thesame functions will be attached with the same reference numerals, andthe description thereof will be omitted.

The present invention in a coaxial cable with a plug, comprising anexternal conductor allowing an insulator to intervene around a centralconductor, and a plug comprising the central contact electricallyconnected to the central conductor and the external contact electricallyconnected to the external conductor is such that the central contact andthe external contact rotate with an axis in a direction orthogonal tothe axial direction of the central conductor as a rotational axis whilemaintaining respective electrical connections with the central contactand the central conductor connecting member and the external contact andthe external conductor connecting member.

First Embodiment

FIG. 1 is a top view showing an external appearance of a coaxial cablewith a plug of a first embodiment according to the present invention.Further, FIG. 2 is a sectional view explaining an internal structure ofthe coaxial cable with a plug of the first embodiment, and is a viewseen from the same direction as FIG. 1. Further, FIG. 3 is a sectionalview explaining the internal structure of the coaxial cable with a plugof the first embodiment, and is a view seen from the right side of thesheet surface of FIG. 1.

In FIGS. 1, 2 and 3, reference numeral 1 denotes a coaxial cable,reference numeral 101 a central conductor, reference numeral 102 aninsulator, reference numeral 103 an external conductor (nettedconductor), reference numeral 104 an exterior covering, referencenumeral 2 a plug, reference numeral 201 a central contact, referencenumeral 202 an external contact, reference numeral 203 a centralconductor connecting member, reference numeral 204 an external conductorconnecting member, reference numeral 205 a first insulating member,reference numeral 206 an injection ring, reference numeral 207 an innerspring, reference numeral 208 a second insulating member, and referencenumeral 209 an insulating cover.

The coaxial cable with a plug of the first embodiment, as shown in FIG.1, comprises a coaxial cable 1 provided with an external conductor(netted conductor) 103 allowing the insulator 102 to intervene aroundthe central conductor 101, and the plug 2 provided with the centralcontact 201 and the external contact 202. At this time, the plug 2 is ofa push-on system, and the central contact 201 and the external contact202 are connecting terminal portions, which are plugged into othercoaxial cables or a receptacle jack provided at home (room) and the wallside face and the like of electronic equipment.

Further, at this time, the central contact 201 and the central conductor101, as shown in FIG. 2, are electrically connected by the externalconductor connecting member 203 provided inside the plug 2. Further, theexternal contact 202 and the external conductor 103, as shown in FIG. 2are also electrically connected by the external conductor connectingmember 204 inside the plug 2.

Further, the central contact 201, as shown in FIG. 2, is fixed by thefirst insulating member 205 and the injection ring 206 so as to maintaina relative position with the external contact 202. Further, in theinside of a cylindrical conductor portion 202A of the external contact202, there is provided the inner spring 207 to make a favorable contactwith the receptacle jack.

Further, the central conductor connecting member 203 and the externalconductor connecting member 204 are provided so as to maintain a coaxialstructure by allowing the second insulating member 208 to intervene.

Further, the central contact 201, as shown in FIG. 2, is bent in such away that a connecting portion with the central conductor connectingmember 203 is superposed with an axis (hereinafter referred to as asecond axis) RX in a direction orthogonal to a main axis (hereinafterreferred to as a first axis) 201X of the central contact 201. Further,the central contact 201 and the central conductor connecting member 203are mechanically in a contacted state, and the central contact 201 isallowed to make a rotational movement with the second axis RX as arotational axis.

Further, the external contact 202, as shown in FIG. 2, is provided witha protrusion 202B which becomes a point of support for rotation at oneend of the cylindrical conductor portion 202A, in other words, at theconnecting portion with the external conductor connecting member 204. Atthis time, the protrusion 202B, as shown in FIG. 3, is a disk-shapedprotrusion such that a protrusion 202 can make a rotational movementwith the second axis RX as a rotational axis, and the external conductorconnecting member 204 supports the protrusion 202B of the externalcontact 202 to nip it, and is mechanically in a contacted state with it.

Further, outside of the external conductor connecting member 204, thereis provided a packing insulation cover 209.

FIGS. 4 to 11 are schematic illustrations explaining an assembly methodof the coaxial cable with a plug of the first embodiment.

When the coaxial cable with a plug of the first embodiment is to beassembled, first, for example, the external contact 202 as shown inFIGS. 4( a) and 4(b) is prepared. The external contact 202 provides arotational point of support comprising a pair of protrusions 202B inwhich the axis RX (second axis) becomes a rotational axis in a directionorthogonal to the central axis of the cylindrical conductor portion 202Aat one end of the cylindrical conductor portion 202A. Further, at thistime, as shown in FIG. 4( b), an opening is made from the one protrusion202B so as to communicate with an inner space of the cylindricalconductor portion 202A.

Next, as shown in FIG. 5, the L-shaped central contact 201 is nipped bythe first insulating member 205 of a half-divided structure, and isinserted into the cylindrical conductor portion 202A of the externalcontact. At this time, a portion connected to the central conductorconnecting portion of the central contact 201 is pointed at an openingdirection of a protrusion 201B, and the injection ring 206 in a statesuperposed with the second axial RX is pushed, thereby fixing the firstinsulating member 205.

Next, for example, as shown in FIG. 6, the inner spring 207 is insertedinto the cylindrical conductor portion 202A of the external contact.

Further, while the central contact 201 is inserted into the externalcontact 202 and fixed, as shown in FIG. 7, the central conductor 101 andthe central conductor connecting member 203 of the coaxial cable 1 areconnected.

At this time, first, as shown in FIG. 7, the coaxial cable 1 is passedthrough a caulking ring 210, and a retaining ring 211 is insertedbetween the external conductor 103 and the insulator 102. The caulkingring 210 is a ring, which is caulked when the coaxial cable 1 is nippedby the external conductor connecting member 204, and assures theelectrical connection with the external conductor 103 of the coaxialcable 1 and the external conductor connecting member 204. Further, theretaining rink 211 is a ring, which prevents the insulator 102 of thecoaxial cable 1, when caulked by the caulking ring 210, from deformingto change in the impedance.

Further, at this time, the central conductor connecting member 203, withits connecting portion with the central conductor 101 of the coaxialcable 1 gutter-shaped, as shown in FIG. 7, puts on and solders thecentral conductor 101 of the coaxial cable 1. Further, the connectingportion of the central contact 201 of the central conductor connectingmember 203 is given a slot so as to be spring-shaped.

Further, the central conductor 101 of the coaxial cable 1 and thecentral conductor connecting member 203 are connected, and after that,as shown in FIG. 7, the central conductor 101 and the central conductorconnecting member 203 are nipped by the second insulating member 208 ofthe half-divided structure.

Next, as shown in FIG. 8, the central conductor connecting member 203which connects the coaxial cable 1 and the central contact 201 which isinserted and fixed to the external contact 202 are connected. At thistime, the central contact 201 is not given a mechanical connection suchas soldering so as to allow it to make a rotational movement. Further,at this time, the second insulating member 208 which nips the centralconductor connecting member 203 is inserted in the opening provided forthe protrusion 202B of the external contact 202, so that the secondinsulating member 208 and the first insulating member 205 are adhered.

Next, as shown in FIG. 9, by the external conductor connecting members204A and 204B which are divided into two portions, the protrusion 202Bof the external contact 202, the central conductor connecting member 203(second insulating member 208), and the external conductor 103 of thecoaxial cable 1 are nipped and fixed by screws and the like. After that,by the caulking ring 210, the connecting portion of the externalconductor connecting members 204A and 204B and the external conductor103 of the coaxial cable 1 are fixed.

Further, at this time, as shown in FIG. 10, the first external conductorconnecting member 204A is provided with grooves, and the second externalconductor connecting member 204B is provided with protrusionscorresponding to the grooves of the first external conductor connectingmember 204A. By providing the grooves and the protrusions, when thefirst external conductor connecting member 204A and the second externalconnecting member 204B are fixed, as shown in FIGS. 11( a) and 11(b), agap is hard to arise between the first external conductor connectingmember 204A and the second external conductor connecting member 204B,the whole peripheries of the insulator 102 of the coaxial cable and thesecond insulating member 208 can be shielded by the external conductorconnection members 204A and 204B. Hence, a leakage of signal from thecentral conductor 101 of the coaxial cable 1 and the central conductorconnecting member 203 can be avoided.

Finally, when the packing insulating cover 209 is attached to theoutside of the external conductor connecting members 204A and 204B, thecoaxial cable with a plug as shown in FIG. 1 can be acquired.

FIG. 12 is a schematic illustration explaining an operational effect ofthe coaxial cable with a plug of the first embodiment, and FIGS. 12( a)and 12(b) are side views showing a using state of the coaxial cable witha plug.

In the coaxial cable with a plug of the first embodiment, the externalcontact 202 is provided with the protrusion 202B at the connectingportion with the external conductor connecting members 204A and 204B,and the central contact 201 and the external contact 202 can be rotatedwhile maintaining the electrical connections with the central contact201 and the central conductor connecting member 203 and the electricalconnections with the external contact 202 and the external conductorconnecting members 204A and 204B. Hence, when the coaxial cable with aplug is connected to a receptacle jack (F type jack, receptacle jack)installed at a wall face and the like at home, the angle of the coaxialcable pulled out from the plug can be freely changed within a plane.That is, for example, as shown in FIG. 12( a), the coaxial cable can beused in state where the main axial direction (first axis) 201X of thecentral contact 201 and the direction (third axis) 1X in which thecoaxial cable attached with the plug is pulled out are in parallel, andas shown in FIG. 12( b), it can be used in state where the first axis201X and the third axis 1X are orthogonal to each other.

As described above, according to the coaxial cable with a plug of thefirst embodiment, the central contact 201 and the external contact 202of the plug rotate while maintaining the electrical contacts with thecentral conductor 101 and the external conductor 103 of the coaxialcable 1, so that the angle of the main axis 201X of the central contact201 and the pulled out direction 1X of the coaxial cable 1 can beadjusted according to an application and a usage place. Hence, forexample, the proper use of the conventional straight type and the rightangle type can be made by one piece of the coaxial cable with a plug ofthe first embodiment, and a degree of freedom of adaptability to theapplication and the usage place can be enhanced.

Second Embodiment

FIGS. 13 to 16 are schematic illustrations showing a general structureof a coaxial cable with a plug of a second embodiment according to thepresent invention, and are oblique views for explaining an assemblyprocedure of the coaxial cable with a plug.

The external appearance of the coaxial cable with a plug of the secondembodiment is the same as the coaxial cable with a plug of the firstembodiment, and as shown in FIG. 1, a plug 2 comprising the centralcontact 201 and the external contact 202 is attached to the end portionof the coaxial cable 1. Further, the central contact 201 and theexternal contact 202, similarly to the coaxial cable with a plug of thefirst embodiment, can be rotated with the second axis RX orthogonal tothe first axis 201X as a rotational axis.

The assembly method of the coaxial cable with a plug of the secondembodiment will be described below along with FIGS. 13 to 16. The sameportions as the first embodiment will be described by using each drawingused in the first embodiment.

First, as shown in FIGS. 4 and 5, along with the procedure described inthe first embodiment, the L-shaped central contact 201 nipped by thefirst insulating member 205 is inserted into the external contact 202having a protrusion 202B which becomes a point of support for rotation,and is fixed by an injection ring 206, and a contact portion into whichan inner spring (not shown) is inserted is prepared.

Next, as shown in FIG. 13, a central connecting member 203 is nipped bya second insulating member 208 of a half-divided structure, and thecentral conductor connecting member 203 and the central contact 201 areconnected. At this time, as described in the first embodiment, aconnecting portion with the central contact 201 of the central conductorconnecting member 203 is provided with a slot so that it becomesspring-shaped. Further, the connecting portion of the central conductorof the coaxial cable of the central conductor connecting member 203 isalso provided with a slot so that it becomes spring-shaped.

Next, as shown in FIG. 14, the contact portion connected to the centralconductor connecting member 203 is fitted into a first externalconductor connecting member 204A in which grooves corresponding to theexternal shapes of the protrusion 202B of the external contact 202 andthe central conductor connecting member 203 (second insulating member208) are provided. At this time, the portion to which the coaxial cable1 of the first external conductor connecting member 204A is attached, asshown in FIG. 14, is provided with a cable fixing pipe 204C.

Next, as shown in FIG. 15, the coaxial cable 1 is inserted from the pipe204C of the first external conductor connecting member 204A, and acentral conductor 101 of the coaxial cable 1 and the central conductorconnecting member 203 are connected. At this time, the pipe 204C of thefirst external conductor connecting member is inserted between aninsulator 102 which insulates the central conductor 101 and an externalconductor 103 of the coaxial cable 1 and the external conductor 103.Further, at this time, the insulator 102 of the coaxial cable 1 and thesecond insulating member 208 are connected so as to be adhered.

Next, as shown in FIG. 16, the first external conductor connectingmember 204A is covered with a second external conductor connectingmember 204B, and is fixed by screws and the like. At this time, sincethe central conductor 101 of the coaxial cable 1 and the centralconductor connecting member are not connected by soldering and the like,there is a risk of the coaxial cable 1 being pulled out. Hence, theportion of the pipe 204C in which the coaxial cable 1 to be connected ispassed through is caulked by a caulking ring 210, so that the coaxialcable 1 is fixed so as not to be pulled out.

As described above, according to the coaxial cable with a plug of thesecond embodiment, similarly to the coaxial cable with a plug of thefirst embodiment, can allow the central contact and the external contactto rotate. Hence, for example, the proper use of the conventionalstraight type and the right angle type can be made by one piece of thecoaxial cable with a plug of the second embodiment, and a degree offreedom of adaptability to the application and the usage place can beenhanced.

Third Embodiment

FIGS. 17 to 20 are schematic illustration showing a general structure ofa coaxial cable with a plug of a third embodiment according to thepresent invention, and are oblique views for explaining an assemblyprocedure of the coaxial cable with a plug.

The external appearance of the coaxial cable with a plug of the thirdembodiment is also the same as the coaxial cable with a plug of thefirst embodiment, and as shown in FIG. 1, the plug 2 comprising thecentral contact 201 and the external contact 202 is attached to the endportion of the coaxial cable 1. Further, the central contact 201 and theexternal contact 202, similarly to the coaxial cable with a plug of thefirst embodiment, can be also rotated with the second axis RX orthogonalto the fist axis 201X as a rotational axis.

The assembly method of the coaxial cable with a plug of the thirdembodiment will be described below along with FIGS. 17 to 20. Thoseparts similar to the first embodiment will be described by using eachdrawing showing in the first embodiment.

First, as shown in FIGS. 4 and 5, along with the procedure shown in thefirst embodiment, the L-shaped central contact 201 nipped by the firstinsulating member 205 is inserted into the external contact 202 having aprotrusion 202B which becomes a point of support for rotation, and isfixed by an injection ring 206, and a contact portion into which aninner spring 207 is inserted is prepared.

Next, as shown in FIG. 17, a central connecting member 203 is nipped bya second insulating member 208 of a half-divided structure, and thecentral conductor connecting member 203 and the central contact 201 areconnected. At this time, similarly to the coaxial cable with a plug ofthe second embodiment, a connecting portion with the central contact 201of the central conductor connecting member 203 is provided with a slotso that it becomes spring-shaped. Further, the connecting portion withthe central conductor of the coaxial cable of the central conductorconnecting member 203 is also provided with a slot so that it becomesspring-shaped.

Next, as shown in FIG. 18, the contact portion connecting the centralconductor connecting member 203 is fitted into a first externalconductor connecting member 204A provided with grooves corresponding toprotrusions 202B of the external contact 202 and the central conductorconnecting member 203 (second insulating member 208).

At this time, in the coaxial cable with a plug of the third embodiment,different from the cases of the first and second embodiments, the firstexternal conductor connecting member 204A is divided at a plane parallelwith the flat surface including the first axis 201X and the second axis(rotational axis) RX. Further, at this time, the portion, to which thecoaxial cable 1 of the first external conductor connecting member 204Ais attached, is provided with a cable fixing pipe 204C as shown in FIG.18.

Next, as shown in FIG. 19, the coaxial cable 1 is inserted from the pipe204C of the first external conductor connecting member 204A, and acentral conductor 101 of the coaxial cable 1 and the central conductorconnecting member 203 are connected. At this time, the pipe 204C of thefirst external conductor connecting member 204A is inserted between aninsulator 102, which insulates the central conductor 101 and theexternal conductor 103 of the coaxial cable 1, and the externalconductor 103.

Next, as shown in FIG. 20, the first external conductor connectingmember 204A is covered with a second external conductor connectingmember 204B, and is fixed by screws and the like. At this time, sincethe central conductor 101 of the coaxial cable 1 and the centralconductor connecting member 203 are not connected by soldering and thelike, there is a risk of the coaxial cable 1 being pulled out. Hence,the connecting portion with the coaxial cable 1 and the pipe 204C of thefirst external conductor connecting member is caulked and fixed by thecaulking ring 210.

As described above, according to the coaxial cable with a plug of thethird embodiment, similarly to the coaxial cable with a plug of thefirst embodiment, the central contact and the external contact can berotated. Hence, for example, the proper use of the conventional straighttype and the right angle type can be made by one piece of the coaxialcable with a plug of the third embodiment, and a degree of freedom ofadaptability to the application and the usage place can be enhanced.

INDUSTRIAL APPLICABILITY

As described above, the coaxial cable with a plug according to thepresent invention is useful as a cable which connects a televisionantenna or a television terminal of the wall face of a building and atelevision receiver, and is suitable to be used particularly in a placewhere surrounding circumstances of the terminal which connects the cabletend to change and a narrow place.

1. A coaxial cable with a plug, comprising a coaxial cable and a plugconnected to an end of the coaxial cable, said plug including: a contactportion having a central contact generally in the form of a rod and anexternal contact generally in tubular form, the central contact and theexternal contact being disposed so as to form a coaxial structure; and amain body portion having a central conductor connecting member whichelectrically connects said central contact and a central conductor ofsaid coaxial cable to each other, and an external conductor connectingmember which electrically connects the external contact and an externalconductor of said coaxial cable to each other, and wherein electricalconnection between said central contact and said central conductorconnecting member and electrical connection between said externalcontact and said external conductor connecting member are made in such amanner that said electrical connections are maintained when said contactportion is rotated, relative to said external conductor connectingmember, on a rotation axis perpendicular to an axial direction of thecentral contact, and wherein when said contact portion is rotated on therotation axis, the coaxial structure about the connection between saidcentral contact and said central conductor connecting member ismaintained before, after and during the rotation.
 2. The coaxial cablewith a plug according to claim 1, wherein said external contact has inan outer peripheral surface of a tubular conductor, a pair ofprojections which function as supporting points on which the rotation onthe rotation axis is performed, one of the projections having a openingvia which communication is provided between the outside and the insideof said tubular conductor at a position through which the rotation axisextends, and wherein a portion of said central contact connected to saidcentral conductor connecting member is bent toward said projectionhaving the opening, and said central contact is supported so that thebent portion coincides with the rotation axis.
 3. The coaxial cable witha plug according to claim 1, wherein a portion of said externalconductor connecting member connected to said external contact isconstituted by two or more conductor parts, and wherein when the two ormore conductor parts are combined, a pair of supporting and fixingportions to be engaged with a pair of projections of said externalcontact are formed.